MERIDIAN AUDIO UHD722 HDMI Processor data

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http://www.mds.com

HDMI in

HDMI out

clocks & frame

syncs

clocks & frame

syncs

GPIO

4 I2S & SPDIF

(1) I

S / SPDIF

SPI

I2C

CEC I/O

CEC

Control

micro

status / control

I2C

INT*

READY*

I2C addr

Sel

control and

audio to host

3.3V power

5V power

I2C

to host

connectors

boot flash

CEC

Output audio

from host

system

DDC

ARC

from

HDMI

out

SPDIF

I2S

CPLD

to micro

HDMI Rx

4:1 MUX

HDMI Tx

video (up to 4:4:4

12 bit format)

SiI9777

EDID

HSR-41Q Block Diagram

HSR-72Q

HSR-41Q

HSR-1Q

Model Inputs Outputs 3D HDR OSD

Audio

Loop

DSD ARC CEC

HSR-82.2 8, one with

HDCP 2.2

300 MHz

two 300 MHz

one with

HDCP 2.2

Ye s N o Ye s Ye s Ye s Ye s Ye s

HSR-41.2 4, one with

HDCP 2.2

300 MHz

one 300 MHz

HDCP 2.2

Ye s N o Ye s Ye s Ye s Ye s Ye s

HSR-72Q 7, all with

HDCP 2.2

600 MHz

one 600 MHz

HDCP 2.2,

one 300 MHz

HDCP 1.4

Ye s Ye s N o Ye s N o Ye s Ye s

HSR-41Q 4, all with

HDCP 2.2

600 MHz

one 600 MHz

HDCP 2.2

Ye s Ye s N o Ye s N o Ye s Ye s

HSR-1Q one 600 MHz

HDCP 2.2

one 600 MHz

HDCP 2.2

Ye s Ye s N o Ye s N o Ye s Ye s

5th generation HDMI repeaters

with audio extract/insert

- Product Summary -

First generation HDMI products supported 165 MHz pixel rates; which allowed 1080p 60 Hz vide with 8 or 12 bit/component color depth (RGB 4:4:4 and YUV 4:2:2 formats). Second generation HDMI products supported 225 MHz equivalent pixel rates, allowing for 1080p 60 Hz video with more than 8 bits/pixel for RGB. Third generation HDMI products support 300 MHz (equivalent), allowing for 4K 24/30 Hz video. The 4th generation product defined new HDCP 2.2 encryption, which the film studio industry requires to view 4K content. 5th generation products support HDMI 2.0b which include full 600 MHz 4K video and HDCP 2.2 on all inputs.

Built with the latest HDMI technology from Analog Devices or Silicon Image (now part of Lattice), MDS OEM HDMI repeater modules for AV applications offer a unique set of features for audio use.

With MDS modules manufacturers can have solutions ready for market with minimal development risk. Manufacturers can focus on the user experience and “front panel” and “rear panel” design and avoid the headaches of the high speed design and the complex software for HDMI processing.

Product Details

The feature comparison following table summarizes the 4th and 5th generation HDMI repeater products available from MDS. A separate datasheet describes MDS’ 4th gen products. All inputs feature adaptive cable EQ that supports (typical, for good quality source and cable) 10m at the highest supported data rate.

Off the shelf platforms for HDMI applications

The HDMI inputs and outputs support the mandatory video features found in the HDMI 2.0 specification at equivalent frequencies up to 600 MHz, which include 4K 60 Hz as well as HDR (10 bit). High quality Tyco HDMI connectors are used to ensure reliable connector operation over the life of the product.

Audio extract/insert

All MDS HDMI repeater products extract the audio (as four I2S lines along with a SPDIF line) for local

processing. The audio decoder can then provide a downmixed stereo PCM signal for the HDMI transmitter.

Common design

The HSR-1Q, HSR-41Q and HSR-72Q are mechanically compatible with the 2nd and later generation MDS HDMI products. The same connector signals are used, though there are slightly different operational characteristics due to the HDMI parts used.

The software API for the three models are likewise a superset of the earlier generation products. This commonality in hardware and software allows system designs to easily incorporate any MDS HDMI repeater product.

HDMI switcher/repeater modules

HSR-41Q HDMI switcher/repeater

Flexible EDID control

An HDMI repeater device would not function well in the real world if it simply assumed the two connected HDMI sink devices support the same capability. For example, an HDMI source might need to route to an audio system and a projector. The projector might only support stereo PCM audio.

If the repeater blindly took the lowest common format among the connected sink devices, the audio system would always be fed 2 channel PCM data by the source instead of surround sound (compressed) data.

The cards can be set to assign input audio formats different from the sink device(s) supported formats.

As with the HSR-82.2, the 2nd output on the HSR-72Q can not pass 4K video. It is suggested that this port be used for audio only to avoid customer confusion in a 4K product.

HDCP 2.2

All three models support HDCP 2.2 on all inputs to support the latest 4K media devices.

mary output, the CEC specification does not support multioutput repeaters. The other specifications on the HSR-72Q are the same as the HSR-41Q.

Developing with MDS HDMI modules

MDS offers an evaluation kit that provide everything needed to evaluate the modules and start code development on your host processor.

HDCP 2.2 introduces a large number of new restrictions on viewing content and can lead to unexpected problems in whole home or commercial installations with a mix of device capabilities. MDS products automatically attempt to avoid as many issues as possible, but can not correct for faulty source devices.

Four input switcher single output repeater

MDS offers a four input, one output switcher/repeater modules, the HSR-41Q.

The HSR-41Q can loop audio from input to output; for AV Receiver applications the general mode of operation is that the decoder would be fed the (Dolby/DTS) encoded input and supply a stereo (PCM) downmix for the sink device.

Mechanically the HSR-41Q can mount into the same set of holes as the HSR-72Q, simplifying chassis designs when two different configurations may be desired.

The HSR-41Q supports pass through of the mandatory 3D formats defined in the HDMI 1.4 specification. The ARC feature is supported but requires a full CEC implementation of the Audio System logical device as defined in the HDMI specification.

The HSR-1Q is a narrower board than the HSR-41Q with just one input connector, but otherwise is identical.

Seven input switcher repeater

Many AV applications require sending video to one location and audio to another. The 72Q’s output can be used for this purpose, or to create a second copy of video for non-4K applications. CEC and ARC are only supported on the pri-

The kit include the module (mounted to a base), interconnect cables, power supply, a (generic) host side API library, and a microprocessor based demonstration program to simplify experimentation.

Host connectors

A 26 pin IDC (.1”) connector carries primary 3.3V power, the

C control signals, and the audio signals received by the

I card.

Note that the audio data may be invalid due to the source creating bad data or things like cable disconnects. Users of the audio data should check status to mute during recognized invalid data periods and be prepared to handle audio clock discontinuities.

MDS Alpha messaging control protocol

All products uses the same I2C based messaging protocol used on other MDS OEM products. Users of those products will find the HDMI modules easy to control; users new to the MDS alpha messaging protocol can start with supplied C++ based examples that can be recompiled to run on typical embedded 32 bit microcontrollers.

Board integration

The boards require 3.3 and 5V power. In addition to the I2S related signals, connection to I2C clock/data, and a (board to host) interrupt line are needed. The board’s reset input should only be released once the supplies are stable and the host is ready to start interacting with the board. For full details the relevant hardware manual should be consulted.

PRELIMINARY - SUBJECT TO CHANGE

5432 Bolsa Ave, Unit B, Huntington Beach, CA 92649, USA Phone: +1 714-378-5805

http://www.mds.com

HDMI switcher/repeater modules

HDMI out

HDMI in

clocks & frame

syncs

clocks & frame

syncs

GPIO

4 I2S & SPDIF

SPI

(1) I2S / SPDIF

Control

micro

status / control

I2C

INT*

READY*

I2C addr

Sel

I2C

to host

connectors

Output audio

from host

system

I2C

primary

secondary

HDMI 1.4 only (no 4K)

boot flash

control and

audio to host

3.3V power

I2C

I2S

CPLD

CEC I/O

CEC

ARC

from

HDMI

out

SPDIF

to micro

SII9777

4 x 1 HDMI switch

4 x 1:2

HDMI

switch

EDID

HSR-72Q Block Diagram

Audio subsystem differences from 4th generation boards

The Silicon Image (now Lattice) devices used in these boards only offer a subset of the audio capabilities of the ADI devices previously used. Key differences to note for customers using this as an upgrade are as follows.

The audio clock interruptions are different, the Lattice part does not maintain valid clock. MDS has added a CPLD to make the board act more like existing MDS HDMI products, but existing systems should be thoroughly revaluated with the new boards.

As noted in the summary table the Lattice HDMI parts do not support DSD.

Only one I2S line (i.e. stereo) is available for audio output with the Lattice part, versus 4 I2S in the prior generation boards. As the output normally only carries a stereo mixdown this should not affect operation. Internally to the HDMI chip all audio can be passed through for a bypass mode.

An audio DAC is connected to the primary I2S input line to allow playback of 2 channel stereo PCM without need to connect external devices. Likewise a SPDIF in and out allows for easy experimentation before connecting into a more complex system.

MDS HDMI testing of a final customer unit

MDS must be supplied with a final unit to run a range of mandatory HDMI tests to ensure conformance with the HDMI licensing rules. Customers with their own HDMI license can do their own family product self certifications.

Two levels of testing are possible, a basic test for cases where CEC is not being used, and a combined basic plus CEC test for units that will use CEC (use of ARC requires CEC). Typical test periods run from 1 to 3 days, unless problems are found, which is unlikely in the basic tests but possible in the CEC test as the host software must process and respond to a range of possible CEC messages.

PRELIMINARY - SUBJECT TO CHANGE

5432 Bolsa Ave, Unit B, Huntington Beach, CA 92649, USA Phone: +1 714-378-5805

http://www.mds.com

Evaluation kit

To gain experience with integrating MDS HDMI products into your system design, MDS offers an evaluation kit that includes the selected HDMI repeater board and the adapter board shown on the last page.

Using this board and the provided software the HSR can be controlled and configured without the need to have your own host application code running yet.

Pass through connectors allow connecting to your audio subsystem but still use the MDS provided software for control and status monitoring. Alternately the EVM board can be setup for loopback of received HDMI audio to the output.

HDMI switcher/repeater modules

HSR-EVM

GPIO

CPLD

programming

4 I2S data

clocks &

frame syncs, mute,

TTL level SPDIF

DAC Out

SPDIF

out

9-12V DC

+3.3

SPDIF

4 I2S data

clocks &

frame syncs, mute,

TTL level SPDIF

power

supplies

CPLD

To HSR: processed audio

from host, Power, SPI

30 / 34 pins

interface

processor

LPC1758

I2C

USB

From HSR: received

HDMI audio, Power, I2C

26 pins

Status LEDS

Reset

To customers DAC eval

board

From customers ADC

eval board

I2C

Serial

Mode

Control

SPI

I2C

SPI

HSR test

port

CS0 - HSR

CS1 - CPLD

stereo

DAC

OFF

12345 678910

Eval kit adapter board

Ordering information

Minimum order quantity of standard OEM boards is 50 pieces. Please contact MDS’ OEM sales manager for details.

HSR-72Q 7 input, HDMI switcher/repeater. One 600 MHz full

featured output.

• HDMI 1.4 & 2.0b mandatory formats

• Up to “4K” pixel rates at 24-60 Hz (4:4:4)

• 4K 4:2:0 format video at 60 Hz

• Up to 12 bit Deep Color and HDR

• All typical colorspaces supported

• Audio extraction/injection (I2S standard) and loop through

• CEC switch and Audio System device support

• ARC (primary output)

HSR-41Q: 4 input HDMI switcher/repeater.

• HDMI 1.4 & 2.0b mandatory formats

• Up to “4K” pixel rates at 24-60 Hz (4:4:4)

• 4K 4:2:0 format video at 60 Hz

• Up to 12 bit Deep Color and HDR

• All typical colorspaces supported

• Audio extraction/injection (I2S standard) and loop through

• CEC switch and Audio System device support

• ARC (primary output)

HSR-1Q: single input HDMI switcher/repeater.

• Same as 41Q except single input

The actual allowed input format is determined by the sink device(s) connected to the unit, the above descriptions define the maximum available capability.

Video using Dolby’s proprietary HDR video format is passed by the board as that format is designed to be backwards compatible. To license Dolby’s video products please contact Dolby for more information.

MERIDIAN AUDIO UHD722 HDMI Processor data

Specifications and Main Features

Frequently Asked Questions

User Manual